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Re: [gpsd-users] OT: Radio Module Time
From: |
Mark Atwood |
Subject: |
Re: [gpsd-users] OT: Radio Module Time |
Date: |
Tue, 09 Aug 2016 10:11:47 -0700 |
Hello George,
Have you considered sending your pull request for fixing the WWVB support for the Symtrik-RFT-60-LP WWVB to NTPsec?
http://www.ntpsec.org/
https://gitlab.com/NTPsec/ntpsec
We work hard to be responsive and friendly.
..m
--
Mark Atwood <address@hidden>
+1-206-604-2198
On Thu, Aug 4, 2016, at 09:52, George Sexton wrote:
This is a little off-topic, but there's a lot of overlap between
the issues I'm having and GPSD, so I thought I'd ask here.
I've got a Symtrik-RFT-60-LP WWVB radio module that I bought
online for like $15. I found the source code for linux on GitHub.
https://github.com/vogelchr/radioclkd2
After fixing the WWVB support (doing the pull request is my next
project), I tried to get it to work in PPS mode. I've found that
the driver PPS support only works in serial port mode, not GPIO
mode for a raspberry pi :(
I've thought about looking at the SHM code for GPSD and seeing if
I could get some ideas on how to handle it. Alternatively, should
I be looking at going the kernel module PPS route? Historically
I've used GPSD for linux GPS/NTP, but I found this article:
https://frillip.com/raspberry-pi-stratum-1-ntp-server/
and it was pretty easy to get going. The only issue I had was to
get the PPS lock, I had to put in a time offset for the NMEA
sentences. I made one stab at getting the NTPD .20 driver to work,
but it's expecting NMEA and PPS to come out of the source so
that's not going. I suppose one option would be to fake a GPRMC
sentence and output it.
Any ideas on directions would be appreciated. I'm sort of
interested in the radio because I want to see if I can get it
working in my co-location server room (and I'm just kind of weird
about time...). Funnily enough, my co-lo is in Fort Collins :)
***
Incidentally, I've just completed a Raspberry PI NTP server using
a Garmin GPS16x-HVS and a custom interface board. I'm going to
sell it on craigslist, but if anyone here is interested in a
turnkey Pi/NTP system, contact me off-list.
--
George Sexton
MH Software, Inc.
Voice: 303 438 9585
http://www.connectdaily.com